| 摘要 |
PURPOSE:To detect a number of malicious call subscriber easily, by providing a number detector of malicious call subscriber between a switching network of an incoming subscriber exchanger and an incoming call subscriber. CONSTITUTION:After a common controller CC makes reception and identification of an incoming call subscriber number, it starts and catches a number detector MCE of malicious call subscriber and completes a train between an incoming trunk ICT and the device MCE. After the confirmation of the train with an opposing station A by the MFC, the transmission request of the number outgoing subscriber is made to the MFC signal transmitter MFCS of a station A as a backward signal. When a 0-SUB number outgoing subscriber is received from the MFC signal receiver MFCR, the content is displayed on a number display panel of outgoing subscriber in the device MCE, a callout signal is transmitted to an incoming subscriber T-SUB and a callout tone is given to the subscriber 0-SUB via an incoming trunk ICT. |
